section 7 - Index of

ABS Absolute Value ABSOperation:I D I ..... D (parallel move)Assembler Syntax:ABS D (parallel move)Description: Take the absolute value of the destination operand D and store the resultin the destination accumulator.Example:ABS A 1 #$123456,XO A,YO ;take abs. value, set up XO, save valueAI ~ ___Before Execution$_FF_:F_F_FF_F_F:F_F_FF_F_2 __ ~After ExecutionA ~I ___ $_O_o:o_o_oo_oo_:o_OO_OO_E __ --'Explanation of Example: Prior to execution, the 56-bit A accumulator contains thevalue $FF:FFFFFF:FFFFF2. Since this is a negative number, the execution of the ABSinstruction takes the twos complement of that value and returns $OO:OOOOOO:OOOOOE.Note: For the case in which the D operand equals $80:000000:000000 (-256.0), theABS instruction will cause an overflow to occur since the result cannot be correctly expressedusing the standard 56-bit, fixed-point, twos-complement data representation.Data limiting does not occur (Le., A is not set to the limiting value of$7F:FFFFFF:FFFFFF).Condition Codes:I15 14 13 12 11 10 9 8 7 6 5 4 3 2 0LF I OM 1 T I" 1 S1 1 SO 1 11 1 10 I "I LIE 1 U 1 N 1 z vic I.... MR ...... CCR .....-S - Computed according to the definition in A.5 CONDITION CODE COMPUTATION.L - Set if limiting (parallel move) or overflow has occurred in resultE - Set if the signed integer portion of A or B result is in useU - Set if A or B result is unnormalizedN - Set if bit 55 of A or B result is setZ- Set if A or B result equals zeroV - Set if overflow has occurred in A or B resultNote: The definitions of the E and U bits vary according to the scaling mode being used.Refer to Section A.5 for complete details.